Antenna base



FIG. 1 is a front elevational view of an antenna base showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a perspective view thereof;

FIG. 8 is another perspective view thereof;

FIG. 9 is another perspective view thereof;

FIG. 10 is a perspective view of the antenna base in use; and,

FIG. 11 is another perspective view of the antenna base in use.

The broken lines illustrate portions of the antenna base which form no part of the claimed design. 

CLAIM The ornamental design for an antenna base, as shown and described. 